Plutonium isotopes in the northwestern South China Sea: Level, distribution, source and deposition

doi:10.1016/j.envpol.2022.118846

	Plutonium isotopes in the northwestern South China Sea: Level, distribution, source and deposition
	Zhang, Mengting 3,4,5; Qiao, Jixin 4; Zhang, Weichao 2,5; Zhu, Liuchao 4; Hou, Xiaolin 1,4,5
刊名	ENVIRONMENTAL POLLUTION
	2022-04-01
卷号	298 页码:10
关键词	Plutonium South China Sea Pacific Proving Ground Deposition Pu-240/Pu-239 atomic ratio
ISSN号	0269-7491
DOI	10.1016/j.envpol.2022.118846
通讯作者	Hou, Xiaolin(xiho@dtu.dk)
英文摘要	The spatial distribution of plutonium isotopes (Pu-239, Pu-240) in the surface sediments collected from the northwestern South China Sea (SCS) in 2018 was investigated. The Pu-239,Pu-240 concentrations in surface sediments vary from 0.048 to 0.960 mBq/g (with mean of 0.282 +/- 0.242 mBq/g) depending on the geographical feature of the sampling location such as the river estuary, continental shelf, slope and deep basin. Higher Pu-240/Pu-239 atomic ratios (0.24-0.31) in the surface sediment of the SCS compared to the global fallout value of 0.18 were observed, this is attributed to the input of close-in fallout of the Pacific Proving Ground (PPG) transported by the North Equatorial Current and Kuroshio Current to the northern SCS. The contribution of the PPG derived plutonium in the SCS sediment was estimated to be 39%-78% using a simple two-end member mixing model based on the measured Pu-240/Pu-239 atomic ratios in the sediment. Besides the soluble Pu-239,Pu-240 level in seawater, load of suspended particulate matter from the river runoff and biological debris, hydrographic and hydrodynamic conditions are key parameters influencing the deposition process of plutonium to the sediment.
资助项目	Chinese Academy of Sciences[XDB40020104] ; Chinese Academy of Sciences[132B61KYSB20180003] ; Natural Science Foundation of China[11875261] ; Ministry of Science and Technology of the People's Republic of China[2015FY110800] ; Ministry of Science and Technology of the People's Republic of China[2018-07] ; NSFC Ship time Sharing Project[41749907]
WOS关键词	PU ISOTOPES ; VERTICAL DISTRIBUTIONS ; ENVIRONMENTAL-SAMPLES ; ACCUMULATION RATES ; FALLOUT PLUTONIUM ; LOESS PLATEAU ; NUCLEAR TEST ; SEDIMENTS ; RADIONUCLIDES ; TRANSPORT
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000766396500003
资助机构	Chinese Academy of Sciences ; Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; NSFC Ship time Sharing Project
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/17556]
专题	中国科学院地球环境研究所
通讯作者	Hou, Xiaolin
作者单位	1.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Ocean Continental Climate & Environm, Qingdao 266061, Shandong, Peoples R China 2.Northwest Inst Nucl Technol, Xian 710024, Shaanxi, Peoples R China 3.Xian Inst Innovat Earth Environm Res, Xian 710061, Shaanxi, Peoples R China 4.Tech Univ Denmark, Dept Environm Engn, Riso Campus, DK-4000 Roskilde, Denmark 5.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian AMS Ctr,Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mengting,Qiao, Jixin,Zhang, Weichao,et al. Plutonium isotopes in the northwestern South China Sea: Level, distribution, source and deposition[J]. ENVIRONMENTAL POLLUTION,2022,298:10.
APA	Zhang, Mengting,Qiao, Jixin,Zhang, Weichao,Zhu, Liuchao,&Hou, Xiaolin.(2022).Plutonium isotopes in the northwestern South China Sea: Level, distribution, source and deposition.ENVIRONMENTAL POLLUTION,298,10.
MLA	Zhang, Mengting,et al."Plutonium isotopes in the northwestern South China Sea: Level, distribution, source and deposition".ENVIRONMENTAL POLLUTION 298(2022):10.